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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 3221 - 3240 of 36151 results
  • Energy Dissipated by Concrete Barriers in Vehicle Impact Scenarios by Combined Numerical and Analytical Approaches
    Energy Dissipated by Concrete Barriers in Vehicle Impact Scenarios by Combined Numerical and Analytical Approaches
    Klugh, Isaac ;
    Jones, Christopher
    2021-10-01 | PDF
    The American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge Design Specifications requires that bridge piers be capable of withstanding a lateral 600 kip static force. Older bridge piers throughout Kansas, specifically those constructed before the requirement for the 600 kip force was established, often have insuffic ...
  • Bridge Deck Cracking Evaluation
    Bridge Deck Cracking Evaluation
    Nelson, Todd ;
    Pham, Le
    2021-10-01 | PDF
    Transverse cracking of concrete bridge decks continues to be an issue for the Montana Department of Transportation (MDT) and is considered a common issue reported among many state departments of transportation (DOTs). In the last 25 years with the introduction of high performance concrete (HPC) in bridge decks to lower permeability and with the use ...
  • Transportation Mobility Assessment and Recommendations for Smart City Planning
    Transportation Mobility Assessment and Recommendations for Smart City Planning
    Elefteriadou, Lily ;
    Classen, Sherrilene
    2021-10-01 | PDF
    The objective of this project was to develop and evaluate a Community-Based Participatory Research (CBPR) methodology for developing transportation mobility plans by assessing the needs of travelers in the community. The methodology was tested and refined at two Gainesville, Florida, neighborhoods: Duval Heights in the East Gainesville (EG) area an ...
  • Daily and Seasonal Movements of Brown Pelicans in the Baha Grande Wetland Complex Technical Report
    Daily and Seasonal Movements of Brown Pelicans in the Bahía Grande Wetland Complex: Technical Report
    Birt, Andrew ;
    Koczur, Lianne
    2021-10-01 | PDF
    This research project implemented a series of studies that investigated the daily and seasonal movements of brown pelicans in the Bahía Grande Wetland Complex (BGWC) of South Texas. The project was motivated by brown pelican mortality that occurs along a stretch of highway (State Highway 48 [SH 48]) that links Brownsville, Texas, to Port Isabel, Te ...
    Supporting Files
  • Using Computational Biology to Mitigate Path Overlap in Transit Assignment
    Using Computational Biology to Mitigate Path Overlap in Transit Assignment
    Becker, Timothy James ;
    Lownes, Nicholas
    2021-10-01 | PDF
    No Description
  • Air Travel Consumer Report October 2021
    Air Travel Consumer Report: October 2021
    United States. Department of Transportation. Office of Aviation Consumer Protection
    2021-10-01 | Air Travel Consumer Report Series | PDF
    The Air Travel Consumer Report is a monthly product of the Department of Transportation's Office of Aviation Consumer Protection. The report is designed to assist consumers with information on the quality of services provided by the airlines. Data Included in this Report Flight Delays: Flight Delays: August 2021; Mishandled Baggage / Wheelchairs an ...
  • Pavement Environmental Life Cycle Assessment Tool for Local Governments
    Pavement Environmental Life Cycle Assessment Tool for Local Governments
    Lea, Jon ;
    Harvey, John T
    2021-10-01 | PDF
    The processes in the pavement life cycle can be defined as: material extraction and production; construction; transport of materials and demolition; the use stage, where the pavement interacts with other systems; the materials, construction, and transport associated with maintenance and rehabilitation; and end-of-life. Local governments are increas ...
  • Understanding and Improving Heterogeneous Modern Recycled Asphalt Mixes
    Understanding and Improving Heterogeneous, Modern Recycled Asphalt Mixes
    Buttlar, William G. ;
    Abdelrahman, Magdy
    2021-10-01 | PDF
    A comprehensive research investigation was carried out to investigate the use of recycled materials in Super-pave asphalt mixtures in Missouri. The investigation involved sampling of aggregates, binders, plant-produced mixtures, and field cores followed by a rigorous lab testing program. Lab testing included an extensive binder extraction and recov ...
  • Life Cycle Integration of Building Information Modeling in Infrastructure Projects
    Life Cycle Integration of Building Information Modeling in Infrastructure Projects
    Guo, Xingzhou ;
    Tian, Chi
    2021-10-01 | PDF
    Building Information Modeling (BIM) can provide solutions to many challenges of asset management, such as missingdata, incompatible software, and an unclear business process. However, current implementation of BIM in infrastructure projects has only considers limited factors, such as technology application and digital information delivery, while is ...
  • Driver Performance and Behavior in Adverse Weather Conditions Microsimulation and Variable Speed Limit Implementation of the SHRP2 Naturalistic Driving Study Results Phase 3
    Driver Performance and Behavior in Adverse Weather Conditions: Microsimulation and Variable Speed Limit Implementation of the SHRP2 Naturalistic Driving Study Results - Phase 3
    Ahmed, Mohamed ;
    Das, Anik
    2021-10-01 | PDF
    The negative impact of adverse weather conditions on traffic safety and operation is the primary focus of many studies. However, in-depth investigations of driver behavior and performance during adverse weather at a trajectory level using naturalistic driving data are limited. Over the years, researchers have utilized aggregate traffic and weather ...
  • Pavement Friction Management Program Demonstration
    Pavement Friction Management Program Demonstration
    Izeppi, Edgar de León ;
    McCarthy, Ross
    2021-10-01 | PDF
    A pavement friction management program (PFMP) should involve both equipment to collect friction and other relevant data as well as processes to analyze friction and crash data to determine possible friction enhancement treatments on sections that warrant it. This project built on previous experience with PFMPs to (1) propose an enhanced methodology ...
  • Evaluation of Connected Vehicle Applications on Mahan Corridor Phase I
    Evaluation of Connected Vehicle Applications on Mahan Corridor, Phase I
    Moses, Ren
    2021-10-01 | PDF
    The communication between roadside units (RSUs) and onboard units (OBUs) using dedicated short range communication (DSRC) was implemented across 22 intersections on Mahan corridor in the City of Tallahassee with the aim of broadcasting signal phasing and timing (SPaT) and intersection map (MAP) information to OBU-equipped vehicles. The overall goal ...
  • An Integrated Critical Information Delivery Platform for Smart Segment Dissemination to Road Users
    An Integrated Critical Information Delivery Platform for Smart Segment Dissemination to Road Users
    Li, Lingxi ;
    Chen, Yaobin
    2021-10-01 | PDF
    An integrated critical information delivery platform for smart segment dissemination to road users was developed. A statewide baseline milepost geodatabase was created at 0.1-mile resolution with tools, protocols, and interfaces that allow other data sources to be efficiently utilized. A variety of data sources (e.g., INRIX, CARS, Doppler, camera i ...
  • Binder Availability in Recycled Materials Review of Literature and Available Quantification Methods
    Binder Availability in Recycled Materials: Review of Literature and Available Quantification Methods
    Martin, Amy Epps ;
    Arambula-Mercado, Edith
    2021-10-01 | PDF
    Increasing recycled material content in asphalt mixtures provides economic and environmental benefits, but each unique material combination of virgin and recycled materials and additives must be engineered to ensure adequate performance with proper selection of component materials and balanced proportioning, as well as consideration of recycled bin ...
  • Prioritized Safety Consideration by Work Zone Types and Pilot Implementation
    Prioritized Safety Consideration by Work Zone Types and Pilot Implementation
    Lin, Pei-Sung ;
    Islam, Mouyid Bin
    2021-10-01 | PDF
    With the growing need for maintenance or reconstruction of existing infrastructure and the construction of new infrastructure, work zone (WZ) setup and management are important for the safe and efficient movement of road users and protection of construction workers and personnel. Applications of Smart Work Zone (SWZ) systems, which are efficient in ...
  • Determination of Input Data for Stone Matrix Asphalt and Polymer Modified DenseGraded Mixtures for Use in the MechanisticEmpirical Pavement Design Guide
    Determination of Input Data for Stone Matrix Asphalt and Polymer Modified Dense-Graded Mixtures for Use in the Mechanistic-Empirical Pavement Design Guide
    Nair, Harikrishnan ;
    Saha, Bipad
    2021-10-01 | PDF
    AASHTO’s Mechanistic Empirical Pavement Design Guide (MEPDG) and AASHTOWare Pavement ME Design software (hereinafter “Pavement ME Design”) provide an improved process for conducting pavement analysis and for developing pavement designs based on mechanistic-empirical principles. The Virginia Department of Transportation (VDOT) officially adopted the ...
  • Where the Sidewalks End Evaluating Pedestrian Infrastructure and Equality
    Where the Sidewalks End: Evaluating Pedestrian Infrastructure and Equality
    Coppola, Nicholas ;
    Marshall, Wesley E.
    2021-10-01 | PDF
    Academic literature has scant research on sidewalks, and some cities are lacking information to rectify an unprecedented backlog of deteriorating pedestrian infrastructure. A lack of data stymies efforts to understand sidewalks, how they may impact equity, and how cities can prioritize where to begin to rectify these issues. Remote sensing data are ...
  • Fauquier County Road Orders 17841800
    Fauquier County Road Orders 1784–1800
    Miller, Ann Brush
    2021-10-01 | PDF
    The road history projects undertaken by the Virginia Transportation Research Council establish the feasibility of studies of early road networks and their use in the environmental review process. These projects, by gathering and publishing the early road orders of the vast parent counties and other significant areas, also lay the foundation for add ...
  • Using Unmanned Aircraft Systems for Crash Reconstructions During Suboptimal Conditions
    Using Unmanned Aircraft Systems for Crash Reconstructions During Suboptimal Conditions
    Quiroga, Cesar ;
    Starek, Michael J.
    2021-10-01 | PDF
    The Texas Department of Transportation (TxDOT) has a strategic interest in using unmanned aircraft systems (UASs) to support a variety of initiatives, including traffic incident management. TxDOT is interested in identifying and documenting UAS uses to determine to what degree UASs can be used to streamline the process to clear and document fatal c ...
  • Studies To Improve Temporary Guide Signs in Work Zones
    Studies To Improve Temporary Guide Signs in Work Zones
    Theiss, LuAnn ;
    Higgins, Laura
    2021-10-01 | PDF
    This report documents the efforts and results of a one-year research project aimed at improving temporary guide signs in long-term work zones. The researchers held discussions with Texas Department of Transportation personnel to gather information about their experiences with temporary guide signs in work zones. The researchers also performed posit ...
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